In this set-up, finely powdered and
granular adsorbents are exposed to 2 ppm formic acid at 50%
RH for 12 weeks. Periodically samples are removed for monitoring
the progress of the exposure. Samples are analyzed using thermalgravimetry
(TG), differential thermal analysis, and evolved gas analysis
in one operation. Separately, total weight % carbon, nitrogen,
hydrogen, and sulfur are analyzed to support the TG analysis.
Photo: Jeffrey Levin.